today about their loss. 30-year-old nicholas ivy and two other men were patrolling the border with mexico near arizona when gunfire broke out. today members of ivy's family spoke out about the wife and two daughters that he left behind, as well as his love for his job. >> nick was a loving husband, father, friend to everybody. >> nick is one of those people that you will be very hard pressed to find anybody that he has rubbed wrong. there's not a bad bone in his body. i honestly believe he probably befriended many of those people that he was out there serving. >> authorities from mexico are holding two men they believe may be connected with that shooting. >>> a scientist from the university of chicago is credited with discovering a new species of dinosaur. it's called pego mastax, the size of a house cat but has teeth like a vampire and quills like a porcupine. this animation shows you what it might have looked like 200 million years ago. not too cute. the fossil was discovered in south africa. the scientist came across it in 1983. but only published his finding this week. he said he simp